[issue10271] warnings.showwarning should allow any callable object

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset aaced3dcb858 by Brett Cannon in branch 'default':
Make warnings accept a callable for showwarnings instead of
http://hg.python.org/cpython/rev/aaced3dcb858

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10271>
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